/*!	 layeradd.cpp
**	 Template File
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**	Copyright (c) 2008 Chris Moore
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include <synfig/general.h>

#include "layeradd.h"
#include <synfigapp/canvasinterface.h>
#include <synfigapp/localization.h>
#include <synfig/layers/layer_pastecanvas.h>
#include <synfig/valuenodes/valuenode_composite.h>

#endif

using namespace std;
using namespace etl;
using namespace synfig;
using namespace synfigapp;
using namespace Action;

ACTION_INIT_NO_GET_LOCAL_NAME(Action::LayerAdd);
ACTION_SET_NAME(Action::LayerAdd, "LayerAdd");
ACTION_SET_LOCAL_NAME(Action::LayerAdd, N_("Add Layer"));
ACTION_SET_TASK(Action::LayerAdd, "add");
ACTION_SET_CATEGORY(Action::LayerAdd, Action::CATEGORY_LAYER);
ACTION_SET_PRIORITY(Action::LayerAdd, 0);
ACTION_SET_VERSION(Action::LayerAdd, "0.0");
ACTION_SET_CVS_ID(Action::LayerAdd, "$Id$");

Action::LayerAdd::LayerAdd()
{
}

synfig::String
Action::LayerAdd::get_local_name()const
{
    if (layer) {
        return strprintf("%s '%s'", _("Add Layer"), layer->get_local_name().c_str());
    } else {
        return _("Add Layer");
    }
}

Action::ParamVocab
Action::LayerAdd::get_param_vocab()
{
    ParamVocab ret(Action::CanvasSpecific::get_param_vocab());

    ret.push_back(ParamDesc("new", Param::TYPE_LAYER)
                  .set_local_name(_("New Layer"))
                  .set_desc(_("Layer to be added"))
                 );

    return ret;
}

bool
Action::LayerAdd::is_candidate(const ParamList &x)
{
    return candidate_check(get_param_vocab(), x);
}

bool
Action::LayerAdd::set_param(const synfig::String& name, const Action::Param &param)
{
    if (name == "new" && param.get_type() == Param::TYPE_LAYER) {
        layer = param.get_layer();

        return true;
    }

    return Action::CanvasSpecific::set_param(name, param);
}

bool
Action::LayerAdd::is_ready()const
{
    if (!layer) {
        return false;
    }

    return Action::CanvasSpecific::is_ready();
}

void
Action::LayerAdd::perform()
{
    // Set the layer's canvas
    layer->set_canvas(get_canvas());

    // Push the layer onto the front of the canvas
    get_canvas()->push_front(layer);

    // Mark ourselves as dirty if necessary

    if (etl::handle<Layer_PasteCanvas>::cast_dynamic(layer)
            && layer->dynamic_param_list().count("transformation") == 0)
        layer->connect_dynamic_param("transformation",
                                     ValueNode_Composite::create(
                                         layer->get_param("transformation"),
                                         get_canvas()));

    // Signal that a layer has been inserted
    if (get_canvas_interface()) {
        get_canvas_interface()->signal_layer_inserted()(layer, 0);
    } else {
        synfig::warning("CanvasInterface not set on action");
    }
}

void
Action::LayerAdd::undo()
{
    // Find the iterator for the layer
    Canvas::iterator iter = find(get_canvas()->begin(), get_canvas()->end(), layer);

    // If we couldn't find the layer in the canvas, then bail
    if (*iter != layer) {
        throw Error(_("This layer doesn't exist anymore."));
    }

    // Remove the layer from the canvas
    get_canvas()->erase(iter);

    // Mark ourselves as dirty if necessary

    // Signal that a layer has been inserted
    if (get_canvas_interface()) {
        get_canvas_interface()->signal_layer_removed()(layer);
    } else {
        synfig::warning("CanvasInterface not set on action");
    }
}